| 摘要 |
A composite dual blackened copper foil (1) includes a copper foil (10) and two blackened layers (30). The copper foil (10) has a shiny side (11) and a matte side (12). The blackened layers (30) are formed on the shiny and matte sides (11, 12) respectively. The blackened layers (30) are alloy formed by electroplating in a plating bath consisting essentially of copper, cobalt, nickel, manganese, magnesium and sodium ions. A rough layer (20) is selectively formed between the blackened layer (30) and the shiny side (11) as well as the matte side (12). Both side of the copper foil (10) is spotless, powder free, and good in etching quality. The copper foil (10) is effective at blocking electromagnetic wave, near infrared, undesired light and the like. The copper foil (10) exhibits strong light absorption and is applicable to direct gas laser drilling. A method of manufacturing the composite dual blackened copper foil (1) is also provided. |
